新抗原架构定义了免疫性,并驱动了异质新抗原表达的瘤的免疫逃避
Malte Roerden1, Andrea B Castro2, Yufei Cui1,3
1Koch Institute for Integrative Cancer Research, Massachusetts Institute for Technology, Cambridge, Massachusetts, USA.
Journal for immunotherapy of cancer
|November 9, 2024
概括
瘤抗原表达模式 (NeoAg架构) 决定了免疫逃避和对癌症免疫治疗的抵抗力. 用RNA疫苗和免疫检查点阻塞 (ICB) 向这些模式可以克服异质瘤的耐药性.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症基因组学 癌症基因组学
背景情况:
- 内异质性 (ITH) 和亚克隆新抗原 (NeoAg) 表达会损害抗瘤免疫力和对免疫检查点阻塞 (ICB) 的反应.
- 这种免疫逃避和治疗耐药性背后的机制尚不清楚,阻碍了对ITH瘤的新治疗方法的开发.
研究的目的:
- 调查NeoAg架构如何影响抗瘤T细胞免疫力和免疫逃避.
- 为了确定NeoAg架构特征是否预测癌症患者的ICB反应.
主要方法:
- 开发了一种具有定义的NeoAg表达的肺腺癌小鼠模型,以研究T细胞免疫力和机制.
- 分析了大量的癌症患者队列,以将NeoAg架构与ICB响应相关联.
主要成果:
- 同时的NeoAg表达和克隆性定义了免疫性,并在异质瘤中驱动免疫逃避.
- 新Ag架构通过交叉呈现的树突细胞 (cDC1) 指令T细胞反应相互作用,导致竞争或协同作用.
- 瘤NeoAg架构驱动的T细胞抑制导致ICB耐药性,但与ICB结合的RNA疫苗接种在亚克隆NeoAg瘤中克服了这一点.
- 全癌症分析证实NeoAg架构介导的T细胞竞争/协同作用预测了ICB反应.
结论:
- 新Ag架构通过控制由cDC1.1介导的T细胞反应来调节瘤免疫性.
- 在ITH瘤中受损的T细胞诱导促进免疫逃避,但可以通过NeoAg架构信息的疫苗接种与ICB结合克服.
- 这种综合方法为治疗高ITH瘤患者提供了一个有前途的策略.
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